Braking system



April 16, 1929- I A. DE CONINCK 1,709,661

BRAKING SYSTEM Original Filed June 10. 1920 140 fl' 4a" 52 4/ a Z4 r 5 a Patented Apr. ltd, 1929.

UNITED STATES PATEN oFFiE.

BRAKING SYSTEM.

Original application filed June 10, 1920, Serial No. 388,055, and. in Germany October 21, 1918. Divided and this application'filed March 31, 1924. Serial No. 703,231.

This invention relates to improvements in automobile brakes, and especially with reference to the provision of wear take-up devices of improved construction, applicable to brakes for the purpose of taking up or compensating for the wear of the segments, as hereinafter shown and described.

The present invention is a divisional application of applicants copending application for Letters Patent of the United States for in'iprovements in braking system, filed December 12, 1921, Ser. No. 521,878, and his application Ser. No. 388,055, filed June 10, 1920, which has resulted in Patent No.

1,412,104 dated April 11, 1922.

It is known to compensate the wear of the brake shoes especially for automobiles by providing on the brake shoes special coinpensating devices, but these known devices have the disadvantage, that the braking powers effect also the compensating elements and especially the screws or bolts which carry the compensating blocks, so that the brake shoes have to be renewed very often on account of the destruction of the com pensating device before they are worn out.

According to the invention these disad vantages are eliminated by providing at the end of each brake shoe a pressure block having step shaped offsets and being connected by a bolt to a similarly shaped reversed block. This last named block is engaged by the expansion member of the brake. Through such an arrangement the connectbig bolt is neither submitted to the brake pressure nor to any shearing stress and will be always in good condition. The drawings represent one form of the invention. Fig. 1 is a front view of the brake mechanism, and

F ig. 2 is a section through the compensating device in a bigger scale.

The invention as here shown has a brake drum 40 and brake jaws or shoes 34 which are arranged in said drum and pivoted, each at its inner end, as at to be brought into engagement with the inner periphery of said drum and which are normall pulled away from the drum 40 by springs 140 which are fastened to a common middle piece, 32. The brake shoes are sustained against the pressure of the springs by means of an expansion member 36 having a cylindrical surface 37 and pressure blocks 38, 42 Said blocks 47 are on the opposing free ends of the brake shoes and are provided on their opposing faces with step shaped offsets 41. The blocks 38 are similar, butreversed with respect to the blocks 47, and have step shaped ofl'jsets 41 which engage the offsets 41. A bolt 44 passes through and has a head embedded in each block 38, the shank of each bolt passing through an enlarged opening 46 in the center of the associated block 47 and being provided with a nut 45 and a washer .45 as shown. Hence the blocks 38 are held tightly pressed against the blocks 47. When a brake shoe becomes worn its nut 45 can be loosened and the block 38 then moved relatively to the block 47 to compensate for wear. The opening 46 is of sufiicient diameter to permit such block movement, and the 'nut is then again tightened.

Having thusdescribed my invention, 1 claim:

1. Device for compensating the wear of brake shoes especially in automobiles, coinprising a pressure block on the ends of the brake shoes, provided with step-shaped olfsets, a reversed similar block connected to the first named block by a bolt, the second block being engaged by the expansion member whereby the bolt is free of the effect of 5 brake pressure and shearing strain.

2. Device for compensating the wear of brake shoes of automobiles and connecting pressure blocks on the ends of the brake shoes and having step-shaped off-sets, a reversed similar block connecting. with each of the first named blocks, bolts forming the connections with said blocks, and an expansion member arranged between and engaged by the second named blocks and relieving the said bolts of the effect of brake pressure and shearing stress.

In witness whereof I afiix my signature.

ARTHUR-DE CONINCK. 

